// ENUM_ITEM(_Name, _Size, _Normlized, _Elements, _OpenGLFormat, _D3D9Format, _D3D10Format)
ENUM_ITEM(Float,	4,	1, false, GL_FLOAT, 0, 0)
ENUM_ITEM(Float2,	8,	2, false, GL_FLOAT, 0, 0)
ENUM_ITEM(Float3,	12,	3, false, GL_FLOAT, 0, 0)
ENUM_ITEM(Float4,	16,	4, false, GL_FLOAT, 0, 0)
ENUM_ITEM(Short2n,	4,	2, true,  GL_SHORT, 0, 0)
ENUM_ITEM(Short4n,	8,	4, true,  GL_SHORT, 0, 0)
ENUM_ITEM(Byte4n,	4,	4, true,  GL_BYTE,  0, 0)